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Circular economy, i.e. a closed-loop economy, is an idea in which the value of products and materials is retained as long as possible. A concept that minimizes the environmental impact of the products created, through such choice of components and design that will allow them to be reused. Speaking of circular economy, it is impossible not to mention the role of alternative fuels. According to the EN-15359: 2005 standard - Solid recovered fuels. Specification and classes, alternative fuels are flammable wastes, def...

The article presents the results of experimental research carried out on a real object and analysis of the effect of preparing oil-related waste with various physical and chemical properties for combustion in a marine auxiliary boiler, on selected components of exhaust gases, such as carbon oxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx) arising as a result of their burning. Oil-related waste comes from operating marine power plants; they are characterised by diverse compositions, heterogeneous structur...

According to the literature [9,15] geothermal energy means a part of the Earth's energy resources accumulated in water, water steam and dry hot rocks. It is classified to a group of renewable resources, virtually inexhaustible due to its transfer from the EarthпїЅs inside by conduction and convection. M. Kaczmarczyk [6] describes geothermal energy as a primary energy originated in the process of the Earth formation and as the energy generated by the radioactive decay. It has been evaluated that the global geotherm...